Fairchild GBU8A service manual
GBU8A - GBU8M
Bridge Rectifiers
Features
• Glass passivated junction
• Surge overload rating: 200 amperes peak
• Reliable low cost construction utilizing molded plastic technique.
• Ideal for printed circuit board.
• UL certified, UL # E326243.
GBU8A - GBU8M — Bridge Rectifiers
February 2012
+
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GBU
Absolute Maximum Ratings T
Symbol Parameter
V
V
RRM
RMS
V
Maximum Repetitive Reverse Voltage 50 100 200 400 600 800 1000 V
Maximum RMS Bridge Input Voltage 35 70 140 280 420 560 700 V
DC Reverse Voltage (Rated VR) 50 100 200 400 600 800 1000 V
R
= 25°C unless otherwise noted
a
8A 8B 8D 8G 8J 8K 8M
Value
Average Recitified Forward Current,
I
F(AV)
I
FSM
T
STG
T
@ Tc = 100°C**
@ T
= 45°C*
a
Non-Repetitive Peak Forward Surge Current
8.3ms Single Half-Sine-Wave
Storage Temperature Range -55 to +150 °C
Operating Junction Temperature -55 to +150 °C
J
8.0
6.0
200 A
* Device mounted on PCB with 0.5 × 0.5” (12 × 12mm).
** Heat-sink mounting, 4"x4"x0.15" Copper plate
Thermal Characteristics
Symbol Parameter Value Units
P
R
R
* Device mounted on PCB with 0.5 × 0.5” (12 × 12mm).
** Heat-sink mounting, 4"x4"x0.15" Copper plate
Power Dissipation 16 W
D
Thermal Resistance, Junction to Ambient, * per leg 18 °C/W
θJA
Thermal Resistance, Junction to Case, ** per leg 3 °C/W
θJC
Units
A
A
Electrical Characteristics T
= 25°C unless otherwise noted
a
Symbol Parameter Value Units
V
I
© 2012 Fairchild Semiconductor Corporation www.fairchildsemi.com
GBU8A - GBU8M Rev. A7 1
Forward Voltage, per element @ 8.0A 1.0 V
F
Reverse Current, per element @ Rated V
R
Ta = 25°C
Ta = 100°C
R
5.0
500
I2t Rating for Fusing t < 8.35ms 166 A2s
μA
μA
Typical Performance Characteristics
GBU8A - GBU8M — Bridge Rectifiers
8
[A]
F
6
4
2
MOUNTED ON PC BOARD,
TA 0.5" (12.7mm) LEAD LENGTH
60Hz RESISTIVE OF INDUCTIVE LOAD
0
0 50 100 150
Average Rectified Forward Current, I
HEAT-SINK
MOUNTING, TC
4"x4"x0.15"
COPPER PLATE
Ambient Temperature [ºC]
Figure 1. Forward Current Derating Curve
10
º
T = 100 C
C
1
[mA]
R
0.1
º
T = 25 C
A
Reverse Current, I
0.01
0 20406080100120140
Percent of Rated Peak Reverse Voltage [%]
100
[A]
F
10
T = 25 C
º
1
Forward Current, I
0.1
0.7 0.8 0.9 1 1.1 1.2 1.3 1.4
A
Pulse Width = 300
1% Duty Cycle
μμμμ
s
Forward Voltage, VF [V]
Figure 2. Forward Voltage Characteristics
250
[A]
FSM
200
150
100
50
0
Peak. Forward Surge Current, I
110100
Number of Cycles at 60Hz
Tj=150°C
8.3ms Single Half Sine-Wave
Figure 3. Reverse Current vs Reverse Voltage
Figure 4. Non-Repetitive Surge Current
400
[pF]
T
T = 25 C
º
100
A
f = 1.0 MHz
Visg = 50m Vp-p
50
Total Capacitance, C
10
1 5 10 50 100
Reverse Voltage, VR [V]
Figure 5. Total Capacitance
© 2012 Fairchild Semiconductor Corporation www.fairchildsemi.com
GBU8A - GBU8M Rev. A7 2
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